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Aralar Mendilerroa
The Aralar Range () is a mountain range in the Basque Mountains of Southern Basque Country. The part of the range lying in Gipuzkoa was established as a conservation area called Aralar Natural Park in 1994. In addition to its natural features, scenic beauty, recreational use and habitation, the range is home to a rich corpus of Basque mythology milestones and legends. Etymology The Basque word, 'Aralar' may stem from the words '(h)aran', meaning 'valley' and 'larre', meaning 'graze-land'. In Spanish, the range is also called ''Sierra de Aralar''. Location The range covers . is conservation area. The range is located in the Basque Country of northern Spain, straddling the boundaries of south-eastern Gipuzkoa and north-western Navarre. The range effectively separates the two provinces. Pamplona lies approximately to the south east. The Spanish coastline at the Cantabrian Sea (the southern Bay of Biscay) and the town of San Sebastian are approximately the same distance to the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Txindoki
Txindoki or Larrunarri is an iconic mountain (1,346 m) located in the region of Goierri, Gipuzkoa, in the Basque Autonomous Community of Spain. Originally Larrunarri or Ñañarri (), the mount took on the popularized name Txindoki by extension after some shepherd huts nearby. It is sometimes referred to as the ''Basque Matterhorn'' too, because of its pyramidal shape. It stands out as the westernmost mountainous tip of the Aralar mountain range, with an easily recognized image that has become a symbol for all the Goierri valley. The towering mountain stands above the northern town Amezketa and its scattered farmhouses at its foot. For the most part, it is not covered in forest just like most of the Gipuzkoan side of Aralar. The steep slopes of the northern face and the Muitze valley are the wild part of Txindoki. The northern and southern side are clearly delimited by a rocky limestone crest running east to west up to the summit, which is almost entirely bare rock. The steep side ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arbizu
Arbizu is a village and municipality in the province and autonomous community of Navarre, northern Spain , image_flag = Bandera de España.svg , image_coat = Escudo de España (mazonado).svg , national_motto = '' Plus ultra'' (Latin)(English: "Further Beyond") , national_anthem = (English: "Royal March") , ..., neighbouring Etxarri-Aranatz. Its traditional "fiesta" falls on June 24, St. John's day, and is noted for the feast held in the main square. References External links ARBIZU in the Bernardo Estornés Lasa - Auñamendi Encyclopedia (Euskomedia Fundazioa) * Municipalities in Navarre {{navarre-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sinkhole
A sinkhole is a depression or hole in the ground caused by some form of collapse of the surface layer. The term is sometimes used to refer to doline, enclosed depressions that are locally also known as ''vrtače'' and shakeholes, and to openings where surface water enters into underground passages known as ''ponor'', swallow hole or swallet. A '' cenote'' is a type of sinkhole that exposes groundwater underneath. A ''sink'' or ''stream sink'' are more general terms for sites that drain surface water, possibly by infiltration into sediment or crumbled rock. Most sinkholes are caused by karst processes – the chemical dissolution of carbonate rocks, collapse or suffosion processes. Sinkholes are usually circular and vary in size from tens to hundreds of meters both in diameter and depth, and vary in form from soil-lined bowls to bedrock-edged chasms. Sinkholes may form gradually or suddenly, and are found worldwide. Formation Natural processes Sinkholes may capture su ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Calcareous
Calcareous () is an adjective meaning "mostly or partly composed of calcium carbonate", in other words, containing lime or being chalky. The term is used in a wide variety of scientific disciplines. In zoology ''Calcareous'' is used as an adjectival term applied to anatomical structures which are made primarily of calcium carbonate, in animals such as gastropods, i.e., snails, specifically about such structures as the operculum, the clausilium, and the love dart. The term also applies to the calcium carbonate tests of often more or less microscopic Foraminifera. Not all tests are calcareous; diatoms and radiolaria have siliceous tests. The molluscs are calcareous, as are calcareous sponges ( Porifera), that have spicules which are made of calcium carbonate. In botany ''Calcareous grassland'' is a form of grassland characteristic of soils containing much calcium carbonate from underlying chalk or limestone rock. In medicine The term is used in pathology, for e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lithology
The lithology of a rock unit is a description of its physical characteristics visible at outcrop, in hand or core samples, or with low magnification microscopy. Physical characteristics include colour, texture, grain size, and composition. Lithology may refer to either a detailed description of these characteristics, or a summary of the gross physical character of a rock. Examples of lithologies in the second sense include sandstone, slate, basalt, or limestone. Lithology is the basis of subdividing rock sequences into individual lithostratigraphic units for the purposes of mapping and correlation between areas. In certain applications, such as site investigations, lithology is described using a standard terminology such as in the European geotechnical standard Eurocode 7. Rock type The naming of a lithology is based on the rock type. The three major rock types are igneous, sedimentary, and metamorphic. Igneous rocks are formed directly from magma, which is a mixture ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Karst
Karst is a topography formed from the dissolution of soluble rocks such as limestone, Dolomite (rock), dolomite, and gypsum. It is characterized by underground drainage systems with sinkholes and caves. It has also been documented for more weathering-resistant rocks, such as quartzite, given the right conditions. Subterranean drainage may limit surface water, with few to no rivers or lakes. However, in regions where the dissolved bedrock is covered (perhaps by debris) or confined by one or more superimposed non-soluble rock strata, distinctive karst features may occur only at subsurface levels and can be totally missing above ground. The study of ''paleokarst'' (buried karst in the stratigraphic column) is important in petroleum geology because as much as 50% of the world's hydrocarbon reserves are hosted in carbonate rock, and much of this is found in porous karst systems. Etymology The English word ''karst'' was borrowed from German language, German in the late 19th century, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Physical Geography Of The Basque Country
The physical geography of the Basque Country is very diverse despite the small size of the region. The territory hosts a blend of green and brown to yellowish tones, featuring hilly terrain altogether. The Basque Country spreads from the rough coastal landscape to the semi-desert of the Bardenas on the south-eastern fringes of Navarre. The main natural limits of the Basque Country are the Bay of Biscay (south-east of Cantabrian Sea) to the north and westside, and in the south side, the Ebro river. The highest point in the Basque Country is the Hiru Erregeen Mahaia peak (2438 m high). Coast The coast of the Basque Country has three sides. The coast of Biscay is rough but in general there are big beaches. There are also at least two big estuaries, that of Ibaizabal (known also as the Ría de Bilbao) and Urdaibai. The coast of Gipuzkoa shows a more rugged terrain and in general the slopes are steeper. From the limit of Biscay to Zumaia there are smaller beaches and they are m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fault (geology)
In geology, a fault is a planar fracture or discontinuity in a volume of rock across which there has been significant displacement as a result of rock-mass movements. Large faults within Earth's crust result from the action of plate tectonic forces, with the largest forming the boundaries between the plates, such as the megathrust faults of subduction zones or transform faults. Energy release associated with rapid movement on active faults is the cause of most earthquakes. Faults may also displace slowly, by aseismic creep. A ''fault plane'' is the plane that represents the fracture surface of a fault. A '' fault trace'' or ''fault line'' is a place where the fault can be seen or mapped on the surface. A fault trace is also the line commonly plotted on geologic maps to represent a fault. A ''fault zone'' is a cluster of parallel faults. However, the term is also used for the zone of crushed rock along a single fault. Prolonged motion along closely spaced faults can blur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plate Tectonics
Plate tectonics (from the la, label=Late Latin, tectonicus, from the grc, τεκτονικός, lit=pertaining to building) is the generally accepted scientific theory that considers the Earth's lithosphere to comprise a number of large tectonic plates which have been slowly moving since about 3.4 billion years ago. The model builds on the concept of ''continental drift'', an idea developed during the first decades of the 20th century. Plate tectonics came to be generally accepted by geoscientists after seafloor spreading was validated in the mid to late 1960s. Earth's lithosphere, which is the rigid outermost shell of the planet (the crust and upper mantle), is broken into seven or eight major plates (depending on how they are defined) and many minor plates or "platelets". Where the plates meet, their relative motion determines the type of plate boundary: '' convergent'', '' divergent'', or ''transform''. Earthquakes, volcanic activity, mountain-building, and oceanic tr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Massif
In geology, a massif ( or ) is a section of a planet's crust that is demarcated by faults or flexures. In the movement of the crust, a massif tends to retain its internal structure while being displaced as a whole. The term also refers to a group of mountains formed by such a structure. In mountaineering and climbing literature, a massif is frequently used to denote the main mass of an individual mountain. The massif is a smaller structural unit of the crust than a tectonic plate, and is considered the fourth-largest driving force in geomorphology. The word is taken from French (in which the word also means "massive"), where it is used to refer a large mountain mass or compact group of connected mountains forming an independent portion of a range. One of the most notable European examples of a massif is the Massif Central of the Auvergne region of France. The Face on Mars is an example of an extraterrestrial massif. Massifs may also form underwater, as with the Atlanti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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